Lifting slings : Web slings Round slings

Introduction - Information

The Unitex Group of companies are manufacturers of textile web- and round slings and lashings with a history of 100 years in the textile industry.

The 100 years of experience and know how is our major asset for innovation, engineering and development of new products. Therefore we are able to manage innovative projects in close co-operation with both costumers, suppliers and third parties. With a resource of qualified personnel we are able to build project teams around any market demand. Furthermore we are one of the few manufacturers to produce slings right through from the basic yarn to the finished products. Because of this, the technical ability and development expertise Unitex constantly is in search for and implementing improvements.

With testing facilities and quality procedures we assure that all processes and products are controlled to comply with applicable standards and specifications. Our specialized equipment subject samples to every conceivable test. Extension, surface abrasion, chemical exposure. Tenacity, temperature and load performance profiles are just some of the test undertaken. The standard and properties claimed for every product are established and approved by our highly qualified laboratory staff.

Web slings Roundslings - Information

1) EN-Standards and Machinery Directives

For all European manufacturers are the technical demands and the references how to produce textile lifting equipment like roundslings and webslings summarized in the EN 1492-1 (Webslings) end the EN 1492-2 (Roundslings). Additionally the textile lifting equipment is encoded with the CE mark according the Machinery Directory 2006/42/EG

2) Testing and Maintenance

To guarantee a safe way of using the textile lifting equipment they must be tested at least one time per year or according the latest publications of the standard or local guidlines. The operator of the equipment has to arrange independently of predetermining operation conditions several test intervals. These tests may only be done by competent persons. Possible damaged Roundslings/Webslings may only be repaired by the manufacturer or by people who have become the power of attorney to repair from the manufacturer.

To guarantee the quality of our products the standard Webslings and Roundslings are being certified by the AIB Vinchotte (VGS), Berufsgenossenschaft (GS) or Lloyds.

3) Lifting of loads (WLL Capacity table and lifting angle)

If a load with a certain weight has to be lifted, the person who has to coordinate this job has to make sure the correct lifting materials are chosen. Also the number of slings, the capacity and the length has to be defined. It is also to plan the lifting procedure and to make sure that the angle of inclination is not more than 60 degrees (an angle of more than 60 degrees is forbidden!)

The bigger the angle of inclination, the smaller the practical capacity of the lifting equipment. As a simple rule you can say:

By an angle of inclination up to 45 degrees the chosen lifting equipment can be calculated with only 70% of the original capacity. For example: 70% of 2T = 0,7 x 2T = 1,4T

By an angle of inclination up to 60 degrees the chosen lifting equipment can be calculated with only 50% of the original capacity. For example: 50% of 2T = 0,5 x 2T = 1,0T


4) Way of use and handling

The European Norm has given each capacity in the EN 1492/1-2 a specific colour. This to identify the capacity of webslings and roundslings easily and clearly.

To make sure the stitching of the eye of a websling wont break open, the angle of opened eye of the websling shouldn’t be more than 20 degrees when it is put into a cranehook

The following rule has to be followed:

You are on the safe side as the eye of the websling at least 3,5 x as long is as the thickness of the cranehook
L2 > = b x 3,5

Be careful: sharp edges will not only damage lifting equipment, but can also lead to accidents


For this reason: The corner radius ,r’ must always to be bigger than the strength ,d’ of the lifting equipment If loads with sharp edges have to be lifted corner protection definitely has to be used. For example Purtecta or Ultra Protect corner protection solutions from Unitex.


Warning: Due to slipping of the load, both corner protection systems, Purtecta and Ultra Protect, can be damaged

Lifting equipment made of polyester fibres with their marked capacity can be used in temperatures between -40 degrees and +100 degrees C.

If they are being used in connection with chemicals it is absolutely necessary to contact the manufacturer beforehand for permission.

 
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